Third is the sale of goods and services. Sale is the exchange of a product or service for money. A car is sold sold to someone in exchange for money. Goods are products that people either need or want; for example, cars can be clasified as goods. Services, on the other hand, are activities that a person or group performs for another person or organization. For instance, an auto mechanic performs a service when he repairs a car. A doctor also performs a service by taking care of people when they are sick.